Create the Mission Detail Page: both UI + functionality

[hoanghm]

Mo has the design for a Misson Detail page.

The basic components seem to be:

• Title
• Description
• CO2 + Eco Point reward amounts
• Steps
  • Format checkbox
  • Each step can have child steps so we need to make this dynamic
  • Each step can be marked as "completed", which sets the according mission's status in our db to "done".
• A section at the end for the user to upload images

When building the UI components, the information can be hardcoded, but by the end of the ticket, all information should be retrieved from the db.